Reliability and Accuracy of Routine Inspection of Highway Bridges
Reliability and Accuracy of Routine Inspection of Highway Bridges
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公路桥梁例行检测的可靠性和准确性
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
G. Washer
中科院分区：
文献类型：
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作者：
B. Phares;B. Graybeal;D. Rolander;M. Moore;G. Washer
常规检测是为满足国家桥梁检测标准的要求而完成的最常见的公路桥梁检测类型。公路桥梁的常规检查通常仅使用目视检查（VI）完成，并且严重依赖桥梁检查员的主观评估。鉴于这种做法和VI可能有影响其可靠性的局限性，联邦公路管理局完成了一项全面的研究，以检查VI的可靠性，因为它是目前在美国实行。通过对6座在役和退役公路桥梁的常规检查，研究了状态评级的准确性和可靠性。这些定时检查是在正常夏季天气情况下在直接观察下完成的。为了确保这项研究的结果将适用于正常的桥梁检查，国家交通部桥梁检查员组成了研究样本，其中包括来自25个州的49名检查员，代表了桥梁检查员人口的不同横截面。研究结果表明，完成常规检查时存在显著差异。具体而言，95%的主要桥梁元件状况评级将在平均值的两个评级点内变化，只有68%的这些评级将在一个评级点内变化。此外，国家桥梁检查标准对状态等级的定义可能没有充分细化，以获得可靠的常规检查结果。
Routine inspection is the most common type of highway bridge inspection completed to satisfy the requirements of the National Bridge Inspection Standards. Routine inspections of highway bridges are typically completed using only visual inspection (VI) and rely heavily on subjective assessments made by bridge inspectors. Given this practice and the fact that VI may have limitations that affect its reliability, the Federal Highway Administration completed a comprehensive study to examine the reliability of VI as it is currently practiced in the United States. The accuracy and reliability of condition ratings generated through routine inspections of six in-service and decommissioned highway bridges were studied. These timed inspections were completed in normal summer weather conditions under direct observation. To ensure that results from this study would be applicable to normal bridge inspections, state department of transportation bridge inspectors made up the study sample, which included 49 inspectors from 25 states, representing a diverse cross section of the bridge inspector population. Results of the study indicate that routine inspections are completed with significant variability. Specifically, 95 percent of primary bridge element condition ratings will vary within two rating points of the average, and only 68 percent of these ratings will vary within one rating point. Additionally, the National Bridge Inspection Standards definitions of condition rating may not be sufficiently refined to allow for reliable routine inspection results.